#include <iostream>

using namespace std;

void jump_ladder(int layer, int* stack, int* top)
{
    if(layer<=0)
        return;

    if(layer == 1){
        printf_layer_one(layer, stack, top);
        return;
    }

    if(layer == 2){
        printf_layer_two(layer,stack,top);
        return;
    }

    return;
}


int main()
{
    cout << "Hello world!" << endl;
    return 0;
}
